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DEC DECtape 551 Manual

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2
CONTENTS
INTRODUCTION AND DESCRIPTION.
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Purpose of Equipment .••••••••
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Functional Description .•
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Physical Description .••
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Physical Specifications ..
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Electrical Description.
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Pertinent Documents.
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SYSTEM DESCRIPTION ..
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Data Control Type 136
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DECtape Control Type 551
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DEC tape Transport Type 555 .
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Recording Format
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Manchester Recording.
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Redundant Recording
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Mark Track Format
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Block Format ...............................•.•.
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Block Mark, Block-Mark Space,
Block-Mark End
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Data
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Reverse Data-End Mark
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Data Mark .............
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Forward Data-End Mark
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Block-Mark Sync
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Reverse Block Mark
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Reverse and Forward End Marks
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Reg isters of the Type 551
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Control Register •.
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Status Reg ister .•.
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Read-Write Buffer ••
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iii

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